qhull version 2009.1-2 failed to build in oneiric

qhull version 2009.1-2 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+source/qhull/2009.1-2/+build/2774523

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+source/qhull/2009.1-2/+build/2774523/+files/buildlog_ubuntu-oneiric-i386.qhull_2009.1-2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 930 lines into the build log:

/build/buildd/qhull-2009.1/src/rbox.c:438: undefined reference to `pow'
/build/buildd/qhull-2009.1/src/rbox.c:490: undefined reference to `sqrt'
/build/buildd/qhull-2009.1/src/rbox.c:511: undefined reference to `cos'
/build/buildd/qhull-2009.1/src/rbox.c:512: undefined reference to `sincos'
/build/buildd/qhull-2009.1/src/rbox.c:651: undefined reference to `sqrt'
/build/buildd/qhull-2009.1/src/rbox.c:616: undefined reference to `sincos'
/build/buildd/qhull-2009.1/src/rbox.c:576: undefined reference to `sqrt'
/build/buildd/qhull-2009.1/src/rbox.c:635: undefined reference to `sqrt'
collect2: ld returned 1 exit status
make[2]: *** [rbox] Error 1
make[2]: Leaving directory `/build/buildd/qhull-2009.1/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/build/buildd/qhull-2009.1'
make: *** [debian/stamp-makefile-build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110909-0238
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/qhull-2009.1